Backpack type battery pack

Abstract

The invention discloses a backpack type battery pack which comprises a backpack assembly, a battery bin mounted on the backpack assembly and a battery pack mounted in the battery bin, and is characterized by further comprising an aligning mechanism mounted on the battery bin and movably connected with the backpack assembly, and a separation assembly mounted in the battery bin, the sheet inserting mechanism is installed on the separating assembly in a sliding mode, and a first limiting assembly is installed on the separating assembly. Through the arrangement of the return mechanism, after any number of batteries in the battery bin are taken away, the battery bin can automatically rotate, the gravity center position of the battery bin is adjusted, and the comfort and safety of a user during carrying are improved; through the arrangement of the insertion piece mechanism, the insertion piece mechanism is moved in the length direction of the separation assembly to clamp the batteries with different lengths and sizes, so that the portability of carrying the battery pack is improved, and the user experience and the market competitiveness of the product are further improved.

Description

A backpack battery pack Technical Field

[0001] This application relates to the field of backpack battery pack technology, and specifically to a backpack battery pack. Background Technology

[0002] The backpack battery pack is a high-capacity, portable power system designed to solve the need for "mobile power" and can be carried on the body like a backpack.

[0003] Early backpack battery packs used fixed-capacity battery packs, with batteries that were either non-removable or could only be replaced as a whole. This design meant that the battery capacity of the pack could not be flexibly adjusted, and users were prone to problems such as insufficient power or excessive weight when carrying it.

[0004] With technological advancements, modular batteries have been introduced into the design of backpack battery packs. This design incorporates batteries, interfaces, and functional components into a modular power system that can be independently disassembled and freely combined, transforming the original fixed assembly into a flexible power supply platform.

[0005] However, users have discovered the following problems with modular batteries during use: 1. The center of gravity easily shifts, affecting comfort: When users adjust the battery level and remove some batteries, the remaining batteries remain in the same position, causing the center of gravity of the entire battery pack to shift. This results in uneven force exerted on the user's shoulders and back by the two shoulder straps when carrying the battery pack, severely affecting user comfort. Prolonged exposure to this imbalance can easily lead to muscle fatigue or even injury.

[0006] 2. Insufficient Battery Size Compatibility: Although modular batteries on the market have a unified interface standard, their different capacities result in different length specifications. Existing backpack battery packs usually have fixed-size slots with fixed pins, meaning they can only accommodate batteries of one size. When users have multiple battery sizes, they face compatibility issues: battery packs of different sizes cannot be inserted into the standard-sized slots due to physical interference, or the pins may not make effective contact, leading to circuit connection failure.

[0007] Therefore, if users want to make full use of battery packs of different capacities, they may be forced to purchase multiple backpack battery packs or adapters of different specifications, which not only increases economic costs but also goes against the original intention of portable design, causing great inconvenience for use and carrying when going out.

[0008] Therefore, there is a need for a backpack-style battery pack that can better accommodate modular batteries. Summary of the Invention

[0009] The purpose of this application is to propose a backpack battery pack that solves the problems of existing backpack battery packs in the background art, such as the center of gravity easily shifting when adapting to modular batteries, affecting comfort and insufficient battery size compatibility.

[0010] To achieve the above objectives, this application proposes a backpack battery pack, including a backpack assembly, a battery compartment, a battery pack installed in the battery compartment, a return mechanism installed on the battery compartment and movably connected to the backpack assembly, a partition assembly installed in the battery compartment, an insert mechanism slidably installed on the partition assembly, and a first limiting assembly installed on the partition assembly.

[0011] Optionally, the battery pack is installed in the battery compartment and electrically connected to the insert mechanism; the battery compartment is provided with a receiving cavity for placing the battery pack, and a partition component divides the receiving cavity to form a first receiving cavity and a second receiving cavity for placing the battery pack, and the first receiving cavity and the second receiving cavity have the same storage space.

[0012] Optionally, the return mechanism includes a rotating component mounted on the battery compartment and movably connected to the carrying assembly, and a locking component mounted on the carrying assembly for locking the rotating component.

[0013] Optionally, when the battery compartment becomes unbalanced, the locking component releases the locking of the rotating component. At this time, the battery compartment automatically rotates to find balance. After the rotation ends and balance is achieved, the locking component locks the rotating component.

[0014] Optionally, the rotating assembly includes a rotating ring movably connected to the carrying assembly, and a connecting plate disposed on the rotating ring and connected to the battery compartment.

[0015] Optionally, the rotating assembly includes a rotating shaft passing through the carrying assembly, a bearing movably mounted on the rotating shaft, the outer wall of the bearing being movably connected to the carrying assembly and the battery compartment, and the end of the rotating shaft away from the battery compartment being controlled by a locking assembly. Optionally, the locking assembly includes a handle movably mounted on the carrying assembly, a locking part mounted on the handle for contact locking of the rotating assembly, and a locking member disposed at the end of the rotating assembly away from the battery compartment. The locking part is locked and / or released by controlling the movement of the locking part through the handle.

[0016] Optionally, the carrying assembly is equipped with a friction-reducing component to reduce the rotational friction of the battery compartment.

[0017] Optionally, the friction reduction assembly includes a first friction reduction structure, a second friction reduction structure, and a third friction reduction structure mounted on the carrying assembly. The third friction reduction structure is used to reduce the friction between the battery compartment and the carrying assembly, while the second and first friction reduction structures are used to reduce the friction between the rotating assembly and the carrying assembly.

[0018] Optionally, the carrying assembly includes a first housing, a second housing mounted on the first housing, a through hole on the second housing corresponding to the rotating assembly, and through slots, movable holes, and grooves on the first housing and / or the second housing.

[0019] Optionally, the rotating assembly is mounted on the battery compartment through a through hole; the locking assembly is movably mounted in the movable hole via a pin and is provided through a through slot.

[0020] Optionally, the first friction-reducing structure includes a first mounting groove disposed at equal angles on the wall of the through hole, a rolling element movably mounted in the first mounting groove, a limiting plate disposed at equal angles in the through hole and in contact with the hole wall, and a first clearance groove disposed on the limiting plate and corresponding to the rolling element, wherein the rolling element contacts the rotating assembly through the first clearance groove.

[0021] Optionally, both the second and third friction-reducing structures include multiple spherical kinematic pairs mounted on the second housing.

[0022] Optionally, the spherical kinematic pair in the second friction-reducing structure is located on the plane of the second housing facing the first housing and is in contact with the rotating component.

[0023] Optionally, the spherical kinematic pair in the third friction-reducing structure is located on the plane of the second housing facing the battery compartment and is in contact with the battery compartment.

[0024] Optionally, the partition assembly includes a partition box installed within the receiving cavity, and a pin structure installed within the partition box that is electrically connected to the insert mechanism.

[0025] Optionally, the partition box consists of two identical mounting shells with a mounting cavity between them. The pin structure is installed in the mounting cavity. The mounting shell is provided with a second mounting groove for installing the reset structure, and a mounting cover corresponding to the second mounting groove is installed on the mounting shell.

[0026] Optionally, the battery compartment is provided with a limiting protrusion, and the mounting shell is provided with a mating groove corresponding to the limiting protrusion.

[0027] Optionally, the separator box is provided with a second clearance groove corresponding to the pin.

[0028] Optionally, the pin structure includes an electrode substrate and a pin plate mounted on the electrode substrate, the pin plate being electrically connected to the pin.

[0029] Optionally, the insert mechanism includes a reset structure mounted on the separator box, an insert structure slidably mounted on the separator box and connected to the reset structure, and a support structure disposed on the separator box and the insert structure for supporting the insert structure. The insert structure is electrically connected to the pin structure.

[0030] Optionally, the reset structure includes a reset seat movably mounted in the mounting cavity, a second elastic member located in the mounting cavity, and a connector mounted on the reset seat and connected to the insert structure.

[0031] Optionally, the mounting cavity and / or the mounting cover are provided with guide blocks, and the reset seat is provided with a groove corresponding to the guide blocks.

[0032] Optionally, the battery pack includes slots corresponding to the support structure.

[0033] Optionally, the insert structure is slidably mounted on the mounting housing. The insert structure includes a pin electrically connected to the pin structure, a sliding seat slidably mounted on the mounting housing, a through groove provided on the top and bottom surfaces of the sliding seat, and a rotating block movably mounted on the through groove. The rotating block is connected to the connector, and the pin is installed in the through groove.

[0034] Optionally, a support structure is provided on the rotating block and the mounting shell, and the support structure includes a mating block provided on the insert structure and a support block provided on the partition box.

[0035] Optionally, when the locking block contacts the top surface of the support block, the minimum straight-line distance between the bottom surface of the limiting block in the first limiting component and the pin is equal to the minimum straight-line distance between the bottom surface of the limiting block in the second limiting component and the pin.

[0036] Optionally, the first limiting component is mounted on the separator box to limit the battery pack located in the first and second receiving cavities; both the first and second receiving cavities are provided with inserting mechanisms.

[0037] Optionally, the battery compartment is further provided with a secondary mounting port communicating with the receiving cavity, and the battery compartment is further provided with a second limiting component for fixing the battery pack; Optionally, both the first limiting component and the second limiting component include a control block, a limiting block controlled by the control block, and a third elastic member abutting against the limiting block.

[0038] Optionally, the first limiting component further includes a first moving groove and a first communicating groove disposed on the separator box. The control block in the first limiting component is Y-shaped. The first limiting component contains two limiting blocks. The two ends of the third elastic member in the first limiting component abut against the two limiting blocks respectively. The limiting blocks and the third elastic member in the first limiting component are located in the first moving groove.

[0039] Optionally, the second limiting component further includes a second moving groove and a second communicating groove disposed at the secondary mounting port opening, wherein the limiting block and the third elastic element in the second limiting component are located in the second moving groove, and the control block in the second limiting component is movably installed in the second communicating groove.

[0040] Optionally, the battery pack includes standard batteries and / or extended batteries, both of which are provided with limiting mating blocks.

[0041] Optionally, the standard battery's slot assembly includes multiple slots arranged parallel to each other on the standard battery, the slots having an opening direction perpendicular to the bottom surface of the standard battery, and the slots limiting the movement of the mating blocks; the extended battery's slot assembly includes an unlocking guide groove arranged on the extended battery, the unlocking guide groove guiding the mating blocks to separate them from the support blocks.

[0042] Compared with the prior art, this application provides a backpack battery pack with the following advantages: The backpack battery pack, through the setting of the return mechanism, allows the battery compartment to automatically rotate after any number of batteries are removed, adjusting the center of gravity until a new equilibrium position is reached. Combined with the setting of the locking component, the return component can be locked after the battery compartment reaches the new equilibrium position, preventing arbitrary rotation of the battery compartment during movement and ensuring that the center of the entire backpack battery system is always in the center of the user's back, improving user comfort and safety. Furthermore, this application, through the setting of the insert mechanism and its movement along the length direction of the dividing component, allows for adjustment of the distance between the insert mechanism and the first limiting component, thereby clamping batteries of different lengths and sizes, improving the portability of the backpack battery pack, and thus enhancing the user experience and market competitiveness of the product. Attached Figure Description

[0043] Figure 1 is a schematic diagram of the overall structure of the battery pack in which the extended battery is placed according to this application.

[0044] Figure 2 is an overall structural view of the battery pack in which the standard battery is placed according to this application.

[0045] Figure 3 is a schematic diagram of the overall structure of the battery pack after the battery pack is removed.

[0046] Figure 4 is a disassembly diagram of the battery pack of this application.

[0047] Figure 5 is a partial enlarged view of point A in Figure 4 of this application.

[0048] Figure 6 is a partial enlarged view of section B in Figure 4 of this application.

[0049] Figure 7 is a structural schematic diagram of the second housing, rotating assembly, and battery compartment of this application.

[0050] Figure 8 is a partial enlarged view of point C in Figure 7 of this application.

[0051] Figure 9 is a disassembly diagram of the second housing and friction assembly of this application.

[0052] Figure 10 is a structural schematic diagram of the upper limit mounting groove of the second housing in this application.

[0053] Figure 11 is a partial enlarged view of point D in Figure 10 of this application.

[0054] Figure 12 is a schematic diagram of the battery compartment structure of this application.

[0055] Figure 13 is a disassembled schematic diagram of the separator component of this application.

[0056] Figure 14 is a partial enlarged view of point E in Figure 13 of this application.

[0057] Figure 15 is a partial enlarged view of point F in Figure 13 of this application.

[0058] Figure 16 is a schematic diagram of the insert mechanism of this application.

[0059] Figure 17 is a disassembly diagram of the first limiting component of this application.

[0060] Figure 18 is a disassembly diagram of the second limiting component of this application.

[0061] Figure 19 is a schematic diagram of the structure of the standard battery of this application.

[0062] Figure 20 is a schematic diagram of the extended battery structure of this application.

[0063] Figure 21 is a schematic diagram of the combination of the card block and the extended battery in this application.

[0064] Figure 22 is a schematic diagram of the combination of the card block and the standard battery in this application.

[0065] Figure 23 is a schematic diagram of the rotating component in Embodiment 2 of this application.

[0066] Figure 24 is a schematic diagram of the installation of the rotating component in Embodiment 2 of this application.

[0067] Figure 25 is a structural schematic diagram of the locking component in Embodiment 3 of this application.

[0068] In the diagram, the markings are as follows: 100, carrying assembly; 110, first housing; 120, second housing; 130, through hole; 140, through groove; 150, movable hole; 160, groove; 200, battery compartment; 210, receiving cavity; 211, first receiving cavity; 212, second receiving cavity; 213, secondary mounting port; 220, limiting protrusion; 300, battery pack; 310, standard battery; 311, limiting mating block; 312, slot; 320, extended battery; 321, unlocking guide groove; 400, return mechanism; 410, rotating assembly. Components; 411, Rotating ring; 412, Connecting plate; 413, Rotating shaft; 414, Bearing; 415, Snap ring; 416, Washer; 417, Locking nut; 420, Locking assembly; 421, Handle; 422, Locking part; 423, First elastic element; 424, Locking element; 4241, Mating part; 4242, Limiting part; 4243, Mating groove; 430, First friction-reducing structure; 431, First mounting groove; 432, Rolling element; 433, Limiting mounting groove; 434, Limiting plate; 435, First clearance groove; 440. Second friction-reducing structure; 441. Mounting hole; 442. Spherical kinematic pair; 450. Third friction-reducing structure; 500. Separator assembly; 510. Separator box; 511. Mounting shell; 512. Mounting cavity; 513. Second mounting groove; 514. Mounting cover; 515. Mating groove; 516. Guide block; 517. Second clearance groove; 520. Pin structure; 521. Electrode substrate; 522. Pin piece; 600. Pin mechanism; 610. Reset structure; 611. Reset seat; 612. Second elastic element; 613. Connector; 614, slide groove; 615, first pulley; 616, second pulley; 620, insert structure; 621, pin; 622, sliding seat; 623, through groove; 624, rotating block; 630, support structure; 631, mating block; 632, support block; 700, first limiting component; 710, first moving groove; 720, first connecting groove; 730, control block; 740, limiting block; 750, third elastic element; 800, second limiting component; 810, second moving groove; 820, second connecting groove. Detailed Implementation

[0069] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, illustrates the present invention. Numerous specific details are set forth in the description below to provide a thorough understanding of the invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0070] The backpack battery pack of this application can be used in outdoor backpack modular battery applications, and of course it can also be used in other similar application scenarios. The following is a detailed description of a backpack battery pack.

[0071] Referring to Figures 1-22, a structural schematic diagram of a preferred embodiment of a backpack battery pack according to this application is shown. The backpack battery pack includes a backpack assembly 100, a battery compartment 200 mounted on the backpack assembly 100, and a battery pack 300 mounted within the battery compartment 200. The battery compartment 200 is equipped with a return mechanism 400 movably connected to the backpack assembly 100. A partition assembly 500 is mounted within the battery compartment 200. An insert mechanism 600 is slidably mounted on the partition assembly 500. A first limiting component 700 is mounted on the partition assembly 500. The battery pack 300 is mounted within the battery compartment 200 and electrically connected to the insert mechanism 600.

[0072] This application, through the design of the carrying component 100, allows the user to carry the battery compartment 200 on their back, facilitating battery transport; the battery compartment 200 provides installation space for the battery; and the return mechanism 400 allows the battery compartment 200 to rotate and adjust its center of gravity when it shifts, causing it to fall off the vertical line from the center of the user's back to the ground. This adjustment restores the center of gravity of the battery compartment 200 back to the center of the user's back, ensuring the battery compartment 200 is properly positioned against the user's shoulders. The pressure is the same, improving the user's carrying comfort; the partition component 500 divides the battery compartment 200 and provides an installation position for the insert mechanism 600; the insert mechanism 600 limits the battery while making an electrical connection with it, and the insert mechanism 600 can move along the partition component 500. The distance between the insert mechanism 600 and the first limiting component 700 can be adjusted to clamp batteries of different lengths; the first limiting component 700, together with the insert mechanism 600, clamps the battery to prevent it from separating from the battery compartment 200, ensuring that the battery can provide power.

[0073] Referring to Figures 4 and 5, in this application, the carrying assembly 100 includes a first housing 110, a second housing 120 bolted to the first housing 110, a through hole 130 on the second housing 120 corresponding to the rotating assembly 410, and a through groove 140, a movable hole 150 and a recess 160 on the first housing 110 and / or the second housing 120.

[0074] This application uses the through hole 130 to avoid the rotating component 410, allowing the rotating component 410 to be located inside the carrying component 100 and connected to the battery compartment 200. It should be noted that the through hole 130 is a tapered hole with a diameter that gradually decreases from the first housing 110 toward the battery compartment 200, ensuring that the rotating component 410 cannot be directly separated from the carrying component 100. The through groove 140, movable hole 150, and recess 160 provide installation space for the locking component 420, allowing the locking component 420 to also be installed inside the carrying component 100, in the same installation space as the rotating component 410. This allows the locking component 420 to lock the rotating component 410, preventing the rotating component 410 from rotating arbitrarily during user carrying, avoiding arbitrary movement of the center of the battery compartment 200, and ensuring user carrying comfort.

[0075] Referring to Figures 3-7, in this application, the battery compartment 200 is provided with a receiving cavity 210 for accommodating the battery pack 300. A limiting protrusion 220 is provided within the receiving cavity 210. A bolt-separating assembly 500, mounted on the limiting protrusion 220, symmetrically divides the receiving cavity 210 into a first receiving cavity 211 and a second receiving cavity 212. By symmetrically dividing the receiving cavity 210, the weight within the first receiving cavity 211 and the second receiving cavity 212 is the same when the receiving cavities are filled with the same number of batteries. It should be noted that when the standard battery 310 is filled in the first receiving cavity 211 and / or the second receiving cavity 212, since there is redundant space at the bottom of the two receiving cavities, this application provides a secondary mounting port 213 on the side of the battery compartment 200, and a second limiting component 800 is installed on the side wall of the secondary mounting port 213. By setting the secondary mounting port 213 and cooperating with the second limiting component 800, this application enables the standard battery 310 to be stored in the redundant space, thereby increasing the space utilization rate in the battery compartment 200 and increasing the amount of power that the battery compartment 200 can carry.

[0076] Referring to Figures 7, 19, and 20, in this application, the battery pack 300 is installed within the battery compartment 200 and electrically connected to the insert mechanism 600; the battery pack 300 includes a standard battery 310 and / or an extended battery 320. It should be noted that the battery in this application can be a lithium battery.

[0077] The standard battery 310 and extended battery 320 in this application are prior art. This application does not improve the principle and internal structure of the battery, but only adjusts the battery casing. Specifically, the adjustment involves adding a limiting engagement block 311 and a slot assembly. Through the setting of the limiting engagement block 311, in conjunction with the first limiting component 700 and the second limiting component 800, the standard battery 310 and extended battery 320 can be clamped and limited to prevent frequent interruptions in battery power supply. Furthermore, the slot assembly on the standard battery 310 includes multiple parallel slots 312. The opening direction of these slots 312 is perpendicular to the bottom surface of the standard battery 310. When the engaging block 631 moves along the slots 312, it cannot rotate. Therefore, the engaging block 631 can only maintain engagement with the support block 632; the slots provided on the extended battery 320 include unlocking guide slots 321 symmetrically arranged on the extended battery 320. The unlocking guide slots 321 are wavy and have an arc at the turning point, which can guide the engaging block 631 to rotate away from the lithium battery. This causes the rotating block 624 with the engaging block 631 to rotate away from the lithium battery, so that the engaging block separates the engaging block 631 from the support block 632, thus removing the support limit on the sliding seat 622. It should be noted that when the engaging block 631 is located on the support block 632, the sliding seat 622 can also move upward along the partition box 510.

[0078] Referring to Figures 4-6, in this application, the return mechanism 400 includes a rotating component 410 mounted on the battery compartment 200 and movably connected to the carrying assembly 100, and a locking component 420 mounted on the carrying assembly 100 for locking the rotating component 410.

[0079] This application uses the rotating component 410 to movably connect the battery compartment 200 and the carrying component 100, allowing the battery compartment 200 to rotate relative to the carrying component 100, thereby adjusting the center of the battery compartment 200; the locking component 420 is used to lock the rotating component 410 to prevent the rotating component 410 from rotating arbitrarily.

[0080] Referring to Figures 4-11, in this application, the rotating assembly 410 includes a rotating ring 411 movably connected to the carrying assembly 100, and a connecting plate 412 disposed on the rotating ring 411 and connected to the battery compartment 200. The diameter of the rotating ring 411 decreases from the carrying assembly 100 toward the battery compartment 200.

[0081] This application utilizes a connecting plate 412, along with bolted connectors, to securely connect to the battery compartment 200. The connecting plate 412 is annular, effectively reducing the weight of the rotating component 410 and thus lessening the weight carried by the user. A rotating ring 411, designed to rotate within the through hole 130, drives the battery compartment 200 to rotate via the connecting plate 412. The rotating ring 411 is a hollow frustum-shaped cone, further reducing its weight and lightening the user's load. Its frustum-shaped design, combined with the through hole 130, causes the rotating ring 411 to gradually decrease in size from the end facing the carrying component 100 towards the end facing the battery compartment 200.

[0082] The mating part 4241 and the mating groove 4243 engage with the locking assembly 420, thereby preventing the mating part 4241 from rotating and locking the rotating member 411, thus preventing the rotating member 411 from rotating and locking the battery compartment 200, preventing the battery compartment 200 from rotating. The limiting part 4242 limits the mating position of the mating groove 4243 and the locking assembly 420, thereby limiting the installation position of the mating part 4241, preventing the mating part 4241 from being over-installed, and ensuring that the locking assembly 420 can lock the rotating assembly 410.

[0083] Referring to Figures 4-8, in this application, the locking assembly 420 includes a handle 421 movably mounted in a through groove 140 via a pin located in a movable hole 150; a locking part 422 mounted on the handle 421 for contact locking of the rotating assembly 410; a first elastic member 423 mounted in a groove 160 for pushing the handle 421 to reset; and a locking member 424 disposed on the end of the rotating ring 411 away from the battery compartment 200. The locking member 424 includes a mating part 4241 disposed on the rotating ring 411; a limiting part 4242 disposed on the mating part 4241; and a mating groove 4243 disposed on the mating part 4241 corresponding to the locking part 422. When a force is applied to the handle 421 to rotate it, the handle 421 presses against the first elastic member 423, releasing the force on the handle 421. Then, the first elastic element 423 resets and pushes the handle 421 to rotate in the opposite direction, so that the locking part 422 contacts the mating part 412 to lock the rotating ring 411. It should be noted that the elastic elements in this application can all be springs. The handle 421 is provided with a rotating hole, and the handle 421 is movably mounted on the pin through the rotating hole, so that the handle 421 can rotate around the pin. The handle 421 is connected to the outside through the through groove 140, so that the operator can directly contact the handle 421 and control the rotation of the handle 421, thereby controlling the rotation of the battery compartment 200. The locking part 422 is a limiting tooth corresponding to the mating groove 4243. The first elastic element 423 is a spring and is located in the groove 160. One end of the first elastic element 423 contacts the locking part 422, and the other end abuts against the bottom of the groove 160.

[0084] Referring to Figures 4-9, this application also includes a friction-reducing component for reducing the frictional force experienced by the return mechanism 400 during rotation. The friction-reducing component includes a first friction-reducing structure 430, a second friction-reducing structure 440, and a third friction-reducing structure 450 mounted on the carrying assembly 100. The third friction-reducing structure 450 is used to reduce the frictional force between the battery compartment 200 and the carrying assembly 100, while the second friction-reducing structure 440 and the first friction-reducing structure 430 are used to reduce the frictional force between the rotating assembly 410 and the carrying assembly 100.

[0085] Referring to Figures 4 and 9, in this application, the first friction-reducing structure 430 includes a first mounting groove 431 that is equidistantly disposed on the wall of the through hole 130, a rolling element 432 that is movably mounted in the first mounting groove 431, a limiting mounting groove 433 that is equidistantly disposed on the wall of the through hole 130, a limiting plate 434 that is equidistantly mounted in the limiting mounting groove 433 and contacts the hole wall, and a first clearance groove 435 disposed on the limiting plate 434 and corresponding to the rolling element 432. The rolling element 432 contacts the rotating assembly 410 through the first clearance groove 435.

[0086] This application provides installation space for the rolling element 432 through the first mounting groove 431, ensuring that the rolling element 432 can be installed movably and rotated. The rolling element 432 also changes the sliding friction between the connecting plate 412 and the wall of the through hole 130 to rolling friction, further reducing the friction force when the connecting plate 412 rotates, making the rotation of the connecting plate 412 smoother, resulting in higher accuracy in adjusting the center of gravity of the battery compartment 200 and enhancing user comfort. The limiting mounting groove 433 provides installation conditions for the limiting plate 434, which is installed on the wall of the through hole 130 by snap-fit, allowing the limiting plate 434 to limit the rolling element 432, ensuring that the rolling element 432 is located within the first mounting groove 431 and will not separate from it. Finally, the first clearance groove 435 allows the rolling element 432 to make contact with the outer wall of the rotating element 310.

[0087] Referring to Figures 4-9, in this application, the second friction-reducing structure 440 and the third friction-reducing structure 450 have the same structure; wherein, both the second friction-reducing structure 440 and the third friction-reducing structure 450 include a plurality of mounting holes 441 provided on the second housing 120, and spherical kinematic pairs 442 are installed in the mounting holes 441; it should be noted that the spherical kinematic pairs 442 are universal balls, which can be installed in the mounting holes 441 by threaded connection or interference fit.

[0088] This application defines the mounting position of the spherical kinematic pair 442 by setting the mounting hole 441; by setting the spherical kinematic pair 442, the sliding friction between the second housing 120 and the mating part 412 is adjusted to rolling friction, and the sliding friction between the second housing 120 and the battery compartment 200 is adjusted to rolling friction, thereby reducing the maximum static friction of the battery compartment 200 and enabling the battery compartment 200 to rotate under less force, thereby improving the self-balancing accuracy of the battery compartment 200.

[0089] Referring to Figure 13, in this application, the separator assembly 500 includes a separator box 510 installed within the receiving cavity 210, and a pin structure 520 installed within the separator box 510 and electrically connected to the insertion mechanism 600. This application uses the separator box 510 to separate the receiving cavity 210, while simultaneously providing installation conditions for the pin structure 520; the pin structure 520, electrically connected to the insertion mechanism 600, is used to transfer electrical energy from the lithium battery, allowing the electrical equipment to operate normally.

[0090] Referring to Figure 13, in this application, the separator box 510 is composed of two identical mounting shells 511, with a mounting cavity 512 formed between the two mounting shells 511. The pin structure 530 is installed in the mounting cavity 512. The mounting shell 511 is provided with a second mounting groove 513 for installing the reset structure 610. A mounting cover 514 corresponding to the second mounting groove 513 is installed on the mounting shell 511. The mounting shell 511 is provided with a mating groove 515 corresponding to the limiting protrusion 220. The mounting cavity 512 and / or the mounting cover 514 are provided with a guide block 516. The mounting shell 511 is provided with a second clearance groove 517 corresponding to the pin 621.

[0091] This application sets the mounting box 510 as two detachable mounting shells 511, which facilitates the later maintenance and replacement of the pin structure 520 located in the mounting cavity 512; the mounting cavity 512 provides installation space for the pin structure 520 and protects the connection between the pin structure 520 and the pin 621.

[0092] Referring to Figure 13, in this application, the pin structure 520 includes an electrode substrate 521 and a pin piece 522 mounted on the electrode substrate 521. The pin piece 522 is electrically connected to the pin 621 and is connected to an external electrical device through a guide.

[0093] Referring to Figures 13-17, in this application, the insert mechanism 600 includes a reset structure 610 mounted on the second mounting groove 513, an insert structure 620 slidably mounted on the mounting shell 511 and connected to the reset structure 610, and a support structure 630 disposed on the partition box 510 and the insert structure 620 for supporting the insert structure 620. The insert structure 620 is electrically connected to the pin structure 520.

[0094] This application utilizes a reset structure 610 to provide a reset force, enabling the insert structure 620 to reset and providing a pulling force for the insert structure 620 to move towards the first limiting component 700, ensuring that the insert structure 620 can cooperate with the first limiting component 700 to clamp the lithium battery. The insert structure 620 is also used to contact the battery tabs of the lithium battery for electrical connection, and the sliding pin structure 620 moves along the height direction of the mounting housing 511, allowing for the clamping of lithium batteries of different lengths.

[0095] Referring to Figures 13-17, in this application, both the first receiving cavity 211 and the second receiving cavity 212 are provided with inserting mechanisms 600; the reset structure 610 includes a reset seat 611 disposed in the mounting cavity 512, a second elastic member 612 mounted on the reset seat 611 and abutting against the bottom of the mounting cavity 512, a connecting member 613 mounted on the reset seat 611 and connected to the sliding pin structure 420, and a sliding groove 614 disposed on the reset seat 611 corresponding to the guide block 516; wherein, a first pulley 615 is mounted in the mounting cavity 512 by a pin or bolt, and the reset structure 610 is a resetting structure 600. A second pulley 616, which contacts the connector 613, is mounted on the seat 611 via a pin. Both ends of the connector 613 are connected to the sliding seat 622 in the insert structure 620. The connector 613 is staggered around the reset moving seat 611 and the first pulley 615 in an S-shaped distribution. It should be noted that the connector 613, when wound around the reset moving seat 611, can contact the second pulley 616 or the arc surface on the reset moving seat 611. The first pulley 615 is located between adjacent reset elastic members 413, and the connector 414 is flexible.

[0096] This application utilizes a reset movable seat 611 to compress the reset elastic element 613, thereby changing the elastic force of the reset elastic element 613, which is suitable for supporting lithium batteries of different lengths and sizes. The reset elastic element 612 supports the reset movable seat 611 and applies an elastic reset force to it, allowing the reset movable seat 611 to automatically reset after the lithium battery is removed. The connecting member 614 connects the reset movable seat 611 to the insert structure 620, enabling the insert structure 620 to move synchronously with the reset movable seat 611. The arrangement of the first pulley 615 and the second pulley 616 provides a foundation for the winding of the connector 613, reduces the friction caused by the movement of the connector 613, and extends the service life of the connector 613. In addition, when the connector 613 is wound, since the reset moving seat 611 can move and the position of the first pulley 615 is fixed in the mounting cavity 512, when the reset seat 611 moves close to the first pulley 615, the sliding seat 622 can move along the length direction of the mounting shell 511. Since the S-shaped distribution of the connector 613 extends a longer length, the sliding seat 622 has a larger range of movement.

[0097] Referring to Figures 13-17, in this application, the insert structure 620 includes a pin 621 installed in the through slot 623 and electrically connected to the pin structure 520, a sliding seat 622 slidably installed on the mounting housing 511, a through slot 623 provided on the sliding seat 622, and a rotating block 624 movably installed on the through slot 623; wherein, the rotating block 624 is provided with a connecting pin 625, which is connected to the connector 613.

[0098] This application uses a sliding seat 622 to support the lithium battery, and in conjunction with the first limiting component 700, it can clamp the standard battery 310 and the extended battery 320. In conjunction with the second limiting component 800, the through slot 623 is provided to allow the pin 621 to pass through the sliding seat 622 and make contact with the pin structure 520. The pin 621 is provided to make an electrical connection with the lithium battery, so that the electrical energy stored in the lithium battery can be delivered to the electrical device through the pin structure 520.

[0099] Referring to Figures 13-17, in this application, the support structure 630 includes a mating block 631 disposed on the rotating block 624 and a support block 632 disposed on the partition box 510; wherein, the mating block 631 protrudes from the surface of the rotating block 624.

[0100] This application, through the setting of the card block 631 and the support block 632, can limit the sliding seat 622 and prevent the sliding seat 622 from moving under the action of gravity.

[0101] Referring to Figures 17-22, in this application, both the first limiting component 700 and the second limiting component 800 include a control block 730, a limiting block 740 controlled by the control block 730, and a third elastic member 750 abutting against the limiting block 740. It should be noted that the limiting block 740 has a slot corresponding to the control block 730, with one end of the control block 730 inside the slot. Therefore, when the user rotates the control block 730, the portion of the control block 730 located inside the slot will push the limiting block 740 to move. It should also be noted that the width of the slot is greater than the size of the portion of the control block 730 located inside the slot.

[0102] This application uses a control block 730 to move a limiting block 740, controlling the clamping and releasing of the limiting block 740 on the lithium battery. The limiting block 740, in conjunction with the limiting engagement block 311 on the lithium battery, can clamp and fix the lithium battery. The third elastic element 750 limits the position of the limiting block 740, preventing it from moving arbitrarily and ensuring that the limiting block 740 clamps and fixes the lithium battery when the user does not control it through the control block 730.

[0103] Referring to Figures 17-22, in this application, the first limiting component 700 further includes a first moving groove 710 and a first communicating groove 720 disposed on the separator box 510. The control block 730 in the first limiting component 700 is Y-shaped. The first limiting component 700 includes two limiting blocks 740. The two ends of the third elastic member 750 in the first limiting component 700 respectively abut against the two limiting blocks 740. The limiting blocks 740 and the third elastic member 750 in the first limiting component 700 are located in the first moving groove 710.

[0104] This application provides installation space for the limiting block 740 in the first limiting component 700 through the first moving groove 710, and guides the movement of the limiting block 740. The first communicating groove 720 provides installation conditions for the control block 730 in the first limiting component 700, allowing the control block 730 to connect with the limiting block 740 in the first limiting component 700 while also communicating with the outside. The control block 730 in the first limiting component 700 is Y-shaped, allowing one control block 730 to drive two limiting blocks 740 to move, thus limiting the lithium batteries in the first receiving cavity 211 and the second receiving cavity 212. It should be noted that when both lithium batteries in the first receiving cavity 211 and the second receiving cavity 212 need to be limited, the user needs to move the control block 730 to the middle position. A rubber ring or similar material can be installed on the pin that serves as the rotation center of the control block 730 to increase the friction during rotation.

[0105] Referring to Figures 17-22, in this application, the second limiting component 800 further includes a second moving groove 810 and a second communicating groove 820 disposed at the secondary mounting port 213. The limiting block 740 and the third elastic member 750 in the second limiting component 800 are located in the second moving groove 810, and the control block 730 in the second limiting component 800 is movably installed in the second communicating groove 820.

[0106] This application provides an installation space for the limiting block 740 in the second limiting component 800 through the second moving slot 810, and guides the movement of the limiting block 740; and provides an installation condition for the control block 730 in the second limiting component 800 through the second communicating slot 820, so that the control block 730 can be connected to the limiting block 740 in the first limiting component 700 while communicating with the outside.

[0107] Referring to Figures 1-22, the usage process of the backpack battery pack in this application is as follows: First, the user selects a standard battery 310 and / or an extended battery 320 with appropriate power according to the task duration or workload, and combines them, then inserts the combined batteries into the battery compartment 200. It should be noted that the first receiving cavity 211 and the second receiving cavity 212 have the same receiving space, and each receiving cavity can hold a maximum of one extended battery 320 or two standard batteries 310. Second, the user inserts the selected battery combination into the battery compartment 200, and inserts the standard battery 310 and / or the extended battery 320... The battery pack is inserted into the receiving cavity 210 of the battery compartment 200. Then the user carries the battery pack on their back. If the number of batteries in the first receiving cavity 211 and the second receiving cavity 212 is different, resulting in different weight in the two receiving cavities, the user can release the lock on the return mechanism 400 by locking component 420. The return mechanism 400 drives the battery compartment 200 to rotate, adjusting the center of gravity of the battery compartment 200. When the center of gravity of the battery compartment 200 is located on the line connecting the center of the user's back to the ground, the center of gravity adjustment of the battery compartment 200 is completed. At this time, the pressure of the battery compartment 200 on the user's shoulders is the same.

[0108] The installation of the standard battery 310 in this application is as follows: When the user installs the standard battery 310 from the opening at the top of the first receiving cavity 211 or the second receiving cavity 212; firstly, the user controls the control block 730 in the first limiting assembly 700 to rotate, and the control block 730 drives the corresponding limiting block 740 to move, so that the limiting block 740 retracts into the first moving groove 710. Then, the user aligns the slot 312 on the standard battery 310 with the mating slot 631 located on the support block 632, and inserts the standard battery 310. Since the slot 312 is a straight groove perpendicular to the bottom surface of the standard battery 310, and the two slots 312 are parallel, they will not push the mating slot 631 to move. The mating slot 631 maintains its mating relationship with the support block 632. After the mating slot 631 is inserted into the bottom of the slot 312, it then passes through the first limiting... The control block 730 in component 700 moves the corresponding limiting block 740 to contact the limiting engagement block 311 of the standard battery 310. When the user installs the standard battery 310 from the secondary mounting port, the user needs to control the control block 730 in the second limiting component 800 to push the limiting block 740 in the second limiting component 800 to move along the second moving groove 810 and retract into the second moving groove 810. Then, the operator inserts the end of the standard battery 310 with the slot 312 facing the inside of the receiving cavity and away from the bottom surface of the battery compartment 200. After insertion, the control block 730 is released, and the third elastic element 750 in the second limiting component 800 pushes the limiting block 740 to reset and contact the limiting engagement block 311. It should be noted that the size of the secondary mounting port 213 corresponds to the standard battery 310 and can only be moved by insertion and removal.

[0109] The installation of the extended battery 320 in this application is as follows: First, the user controls the control block 730 in the first limiting component 700 to rotate. The control block 730 drives the corresponding limiting block 740 to move, causing the limiting block 740 to retract into the first moving groove 710. Then, the user aligns the unlocking guide groove 321 on the extended battery 320 with the mating block 631 on the support block 632 and inserts the extended battery 320. The unlocking guide groove 321 on the extended battery 320 guides the mating block 631 on the support block 632, causing the mating block 631 to move away from the mounting shell 511. The mating block 631 separates from the support block 632. At this time, the sliding seat 622 can move along the bottom of the mounting shell 511 cavity, allowing the extended battery 320 to be smoothly inserted into the receiving cavity. Subsequently, the control block 730 in the first limiting component 700 moves the corresponding limiting block 740, which then moves to the limiting mating block 31 of the extended battery 320. 1. Contact; The specific adjustment process of the return mechanism 400 in this application is as follows: The user applies force to the part of the handle 421 located outside the carrying assembly 100, causing the handle 421 to rotate around the pin located in the movable hole 150. The part of the handle 421 located inside the carrying assembly 100 begins to rotate, compressing the first elastic member 423. The locking part 422 separates from the mating groove 4243, and the limiting lock on the locking member 424 is released. At this time, the battery compartment 200 generates a torque due to the imbalance of the center of gravity, which is greater than the friction force that the battery compartment 200 needs to overcome to rotate. At this time, the battery compartment rotates under the action of the gravitational torque until the connection line between the center of gravity and the rotating ring 411 is in the plumb direction. Subsequently, the user releases the handle 421, the first elastic member 423 elastically resets, pushes the handle 421 to rotate, so that the locking part 422 on the handle 421 engages with the mating groove 4243, locking and limiting the locking member 424, thereby locking and limiting the battery compartment 200.

[0110] Referring to Figures 23 and 24, the difference between this embodiment and the previous embodiment is that, in this embodiment, the rotating assembly 410 includes a rotating shaft 413 passing through the carrying assembly 100, a bearing 414 movably mounted on the rotating shaft 413, a retaining ring 415 mounted on the rotating shaft 413, a washer 416 fitted on the rotating shaft 413, and a locking nut 417 mounted on the rotating shaft 413 and in contact with the washer 416; wherein, the outer wall of the bearing 414 is movably connected to the carrying assembly 100 and the battery compartment 200, the end of the rotating shaft 413 away from the battery compartment 200 is controlled by the locking assembly 420, and the locking nut 417 is located on the battery compartment 200.

[0111] It should be noted that one end of the rotating shaft 413 is fixedly connected to or integrally formed with the locking member 424 in the locking assembly 420, and the other end of the rotating shaft 413 is fixed to the battery compartment 200 by bolts. The battery compartment 200 is assembled from an outer shell and an inner compartment, and the locking nut 417 is located between the outer shell and the inner compartment. The bearing 414 is a thrust end face combined bearing. The bearing capacity of this thrust end face combined bearing is greater than the weight of the battery compartment 200 under full load, ensuring that the battery compartment 200 can rotate.

[0112] Since bearing 414 is a standard part, it can be purchased directly, which reduces the production cost of this application and improves production efficiency. In addition, by setting bearing 414 as a thrust end face combined bearing, friction components can be eliminated, further reducing production costs.

[0113] Referring to Figure 25, the difference between this embodiment and the previous embodiment is that, in this embodiment, the locking assembly 420 includes a handle 421 movably mounted on the carrying assembly 100, a locking part 422 mounted on the handle 421 for contact locking of the rotating assembly 410, a first elastic member 423 disposed on the handle 421, and a locking member 424 disposed at the end of the rotating assembly 410 away from the battery compartment 200; wherein, the first elastic member 423 is an arc-shaped spring.

[0114] The above embodiments are illustrative of this application and are not intended to limit this application. Any simple modifications to this application are within the protection scope of this application.

Claims

1. A backpack-style battery pack, comprising a carrying assembly (100) and a battery compartment (200), wherein a battery pack (300) is installed within the battery compartment (200); characterized in that, Also includes: A return mechanism (400) is installed in the battery compartment (200) and movably connected to the carrying assembly (100), allowing the battery compartment (200) to rotate relative to the carrying assembly (100); a partition assembly (500) is installed inside the battery compartment (200) to partition the space inside the battery compartment (200); an insert mechanism (600) is installed in the partition assembly (500) and contacts the battery pack (300) to transfer electrical energy to the battery pack (300); a first limiting assembly (700) is installed in the partition assembly (500) and located at the opening of the battery compartment (200), contacting the end of the battery pack (300) to limit the battery pack (300).

2. The backpack battery pack according to claim 1, characterized in that, The battery compartment (200) is provided with a receiving cavity (210) for placing the battery pack (300). The dividing component (500) divides the receiving cavity (210) to form a first receiving cavity (211) and a second receiving cavity (212) for placing the battery pack (300). The return mechanism (400) includes a rotating component (410), which is installed in the battery compartment (200) and movably connected to the carrying component (100). The battery compartment (200) rotates relative to the carrying component (100) through the rotating component (410). The locking component (420) is installed on the carrying component (100) and the rotating component (410) to lock the rotating component (410) and prevent the rotating component (410) from rotating at will. When the battery compartment (200) becomes unbalanced, the locking component (420) locks the rotating component (410). Under the action of gravity, the battery compartment (200) automatically rotates with the rotating component (410) to find balance. After the rotation ends and balance is achieved, the locking component (420) locks the rotating component (410).

3. The backpack battery pack according to claim 2, characterized in that, The rotating assembly (410) includes a rotating ring (411) movably connected to the carrying assembly (100), and a connecting plate (412) disposed on the rotating ring (411) and connected to the battery compartment (200); or, the rotating assembly (410) includes a rotating shaft (413) passing through the carrying assembly (100), and a bearing (414) movably mounted on the rotating shaft (413), the outer wall of which is movably connected to the carrying assembly (100) and the battery compartment (200), and the end of the rotating shaft (413) away from the battery compartment (200) is controlled by a locking assembly (420).

4. The backpack battery pack according to claim 2, characterized in that, The locking assembly (420) includes a handle (421) movably mounted on the backpack assembly (100), a locking part (422) mounted on the handle (421) for contact locking of the rotating assembly (410), and a locking member (424) disposed at the end of the rotating assembly (410) away from the battery compartment (200). The locking part (422) is controlled to move by the handle (421) to lock and / or release the locking member (424).

5. The backpack battery pack according to claim 2, characterized in that, The carrying assembly (100) includes a first housing (110), a second housing (120) mounted on the first housing (110), a through hole (130) on the second housing (120) corresponding to the rotating assembly (410), and a through groove (140), a movable hole (150) and a recess (160) on the first housing (110) and / or the second housing (120); the rotating assembly (410) is mounted on the battery compartment (200) through the through hole (130); the locking assembly (420) is movably mounted in the movable hole (150) by a pin and is provided through the through groove (140).

6. The backpack battery pack according to claim 2, characterized in that, The separator assembly (500) includes a separator box (510) installed in a receiving cavity (210), and a pin structure (520) installed in the separator box (510) and electrically connected to the insert mechanism (600); the insert mechanism (600) is provided in both the first receiving cavity (211) and the second receiving cavity (212); the insert mechanism (600) includes a reset structure (610) installed on the separator box (510), an insert structure (620) slidably installed on the separator box (510) and connected to the reset structure (610), and a support structure (630) provided on the separator box (510) and the insert structure (620) for supporting the insert structure (620); the insert structure (620) is electrically connected to the pin structure (520); the battery The battery pack (300) is provided with slots corresponding to the support structure (630); the battery compartment (200) is also provided with a secondary mounting port (213) communicating with the receiving cavity (210), and the battery compartment (200) is also provided with a second limiting component (800) for fixing the battery pack (300); the insert structure (620) is slidably mounted on the mounting shell (511), and the insert structure (620) includes a plug (621) electrically connected to the plug structure (520), the position of which can be adjusted to accommodate batteries of different lengths; the first limiting component (700) is mounted on the partition box (510) for limiting the battery pack (300) located in the first receiving cavity (211) and the second receiving cavity (212).

7. The backpack battery pack according to claim 6, characterized in that, The separator box (510) consists of two identical mounting shells (511), with a mounting cavity (512) formed between the two mounting shells (511). The pin structure (530) is installed in the mounting cavity (512). The mounting shell (511) is provided with a second mounting groove (513) for installing the reset structure (610), and a mounting cover (514) corresponding to the second mounting groove (513) is installed on the mounting shell (511). The pin structure (520) includes an electrode substrate (521) and a pin piece (522) installed on the electrode substrate (521), which is electrically connected to the pin (621). The battery compartment (200) is provided with a limiting protrusion (220), and the mounting shell (511) is provided with a mating groove (515) corresponding to the limiting protrusion (220). The separator box (510) is provided with a second clearance groove (517) corresponding to the pin (621).

8. The backpack battery pack according to claim 3, characterized in that, The carrying assembly (100) is equipped with a friction-reducing component for reducing the rotational friction of the battery compartment (200); the friction-reducing component includes a first friction-reducing structure (430), a second friction-reducing structure (440) and a third friction-reducing structure (450) installed on the carrying assembly (100), the third friction-reducing structure (450) is used to reduce the friction between the battery compartment (200) and the carrying assembly (100), and the second friction-reducing structure (440) and the first friction-reducing structure (430) are used to reduce the friction between the rotating assembly (410) and the carrying assembly (100).

9. The backpack battery pack according to claim 7, characterized in that, The reset structure (610) includes a reset seat (611) movably mounted in the mounting cavity (512), a second elastic member (612) located in the mounting cavity (512), and a connector (613) mounted on the reset seat (611) and connected to the insert structure (620); the mounting cavity (512), and / or the mounting cover (514) is provided with a guide block (516), and the reset seat (611) is provided with a sliding groove (614) corresponding to the guide block (516); the insert structure (620) further includes A sliding seat (622) is slidably mounted on the mounting shell (511), a through groove (623) is provided on the sliding seat (622), and a rotating block (624) is movably mounted on the through groove (623). The rotating block (624) is connected to the connector (613). The pin (621) is installed in the through groove (623). The top and bottom surfaces of the sliding seat (622) are provided with the through groove (623). The support structure (630) is provided on the rotating block (624) and the mounting shell (511).

10. The backpack battery pack according to claim 7, characterized in that, The first limiting component (700) and the second limiting component (800) both include a control block (730), a limiting block (740) controlled by the control block (730), and a third elastic member (750) abutting against the limiting block (740); the battery pack (300) includes a standard battery (310) and / or an extended battery (320), both the extended battery (320) and the standard battery (310) are provided with limiting mating blocks (311); the first receiving cavity (211) and the second receiving cavity (212) have the same storage space; the support structure (630) includes a mating block (631) provided on the insert structure (620) and a support block (632) provided on the partition box (510); the mating block (631) contacts the top surface of the support block (632). At that time, the minimum straight-line distance between the bottom surface of the limiting block (740) in the first limiting component (700) and the pin (621) is equal to the minimum straight-line distance between the bottom surface of the limiting block (740) in the second limiting component (800) and the pin (621); the slot group of the standard battery (310) includes a plurality of slots (312) arranged in parallel on the standard battery (310), the slotting direction of the slot (312) is perpendicular to the bottom surface of the standard battery (310), and the slot (312) limits the mating block (631); the slot group of the extended battery (320) includes an unlocking guide groove (321) arranged on the extended battery (320), the unlocking guide groove (321) guides the mating block (631) to separate the mating block (631) from the support block (632).

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